Custom-built Heat-resistant Cast Alloy Steel Diaphragm Carrier Ring with Precision CNC Machining for Steam Turbines

Our custom-built Diaphragm Carrier Ring is a core stationary component for steam turbines, designed to hold and support multi-stage turbine diaphragms inside the turbine casing. Manufactured per customer drawings, technical specifications and operating-condition requirements, this heavy-duty cast-alloy housing delivers stable positioning for diaphragm assemblies, optimizes steam flow layout, shortens turbine axial dimension, and simplifies on-site assembly & disassembly procedures.

Widely deployed for HP, IP and LP sections of utility power-plant turbines, industrial steam turbines, retrofit & replacement projects for both new-build and overhaul units.

• Secure mounting and precise positioning for multi-stage turbine diaphragms inside turbine casing
• Isolate steam chambers between adjacent stages, minimize inter-stage steam leakage
• Decouple diaphragm layout from casing extraction openings, allowing compact axial design of turbine modules
• Compensate for thermal expansion under high-temperature working conditions, maintain concentricity between diaphragms and rotor during long-term operation
• Enable modular removal of diaphragm stacks, greatly shortening unit outage & maintenance duration

• High-reliability casting quality with strict process control and minimized internal defects
• Precision machining accuracy with CNC-machined critical fitting surfaces to tight tolerances
• Excellent thermal-mechanical performance with specially selected turbine-grade alloys
• Easy-maintenance modular design with split-half structure for quick inspection and removal
• Full-range quality inspection with complete documentation and certification

• Coal-fired power-plant steam turbines (HP / IP / LP cylinder sections)
• Cogeneration & industrial process steam turbines
• Biomass power station turbine equipment
• Nuclear auxiliary steam turbine units
• Retrofitting, upgrade and spare-part replacement for existing turbine fleets

All components comply with international power-equipment standards. We provide complete material certificates, heat-treatment records, NDT inspection reports and dimensional inspection documents. Accept third-party witness inspection. Flexible packaging for heavy-duty over-size cast-machined parts for sea-land transportation.